221121003 has 8 divisors (see below), whose sum is σ = 296457616. Its totient is φ = 146599200.

The previous prime is 221120983. The next prime is 221121013. The reversal of 221121003 is 300121122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 221121003 - 2¹³ = 221112811 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221121003.

It is not an unprimeable number, because it can be changed into a prime (221121013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 203068 + ... + 204153.

It is an arithmetic number, because the mean of its divisors is an integer number (37057202).

Almost surely, 2^221121003 is an apocalyptic number.

221121003 is a deficient number, since it is larger than the sum of its proper divisors (75336613).

221121003 is a wasteful number, since it uses less digits than its factorization.

221121003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407405.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 221121003 is about 14870.1379617003. The cubic root of 221121003 is about 604.7046829549.

Adding to 221121003 its reverse (300121122), we get a palindrome (521242125).

The spelling of 221121003 in words is "two hundred twenty-one million, one hundred twenty-one thousand, three".